<template>
	<el-menu
		:default-active="activeMenu"
		mode="horizontal"
		@select="handleSelect"
	>
		<template v-for="(item, index) in topMenus">
			<el-menu-item
				:style="{ '--theme': theme }"
				:index="item.path"
				:key="index"
				v-if="index < visibleNumber"
				><svg-icon :icon-class="item.meta.icon" />
				{{ item.meta.title }}</el-menu-item
			>
		</template>

		<!-- 顶部菜单超出数量折叠 -->
		<el-sub-menu
			:style="{ '--theme': theme }"
			index="more"
			v-if="topMenus.length > visibleNumber"
		>
			<template #title>更多菜单</template>
			<template v-for="(item, index) in topMenus">
				<el-menu-item
					:index="item.path"
					:key="index"
					v-if="index >= visibleNumber"
					><svg-icon :icon-class="item.meta.icon" />
					{{ item.meta.title }}</el-menu-item
				>
			</template>
		</el-sub-menu>
	</el-menu>
</template>

<script setup>
import {ref, computed, onBeforeUnmount, onMounted} from 'vue';
import {useRoute, useRouter} from 'vue-router';
import {constantRoutes} from '@/router';
import {isHttp} from '@/utils/validate';
import useAppStore from '@/store/modules/app';
import useSettingsStore from '@/store/modules/settings';
import usePermissionStore from '@/store/modules/permission';

// 顶部栏初始数
const visibleNumber = ref(null);
// 当前激活菜单的 index
const currentIndex = ref(null);
// 隐藏侧边栏路由
const hideList = ['/index', '/user/profile'];
const appStore = useAppStore();
const settingsStore = useSettingsStore();
const permissionStore = usePermissionStore();
const route = useRoute();
const router = useRouter();
// 主题颜色
const theme = computed(() => settingsStore.theme);
// 所有的路由信息
const routers = computed(() => permissionStore.topbarRouters);
// 顶部显示菜单
const topMenus = computed(() => {
	const topMenus = [];
	routers.value.map(menu => {
		if (menu.hidden !== true) {
			// 兼容顶部栏一级菜单内部跳转
			if (menu.path === '/') {
				topMenus.push(menu.children[0]);
			} else {
				topMenus.push(menu);
			}
		}
	});
	return topMenus;
});
// 设置子路由
const childrenMenus = computed(() => {
	const childrenMenus = [];
	routers.value.map(router => {
		for (const item in router.children) {
			if (router.children[item].parentPath === undefined) {
				if (router.path === '/') {
					router.children[item].path
						= '/' + router.children[item].path;
				} else if (!isHttp(router.children[item].path)) {
					router.children[item].path
							= router.path + '/' + router.children[item].path;
				}

				router.children[item].parentPath = router.path;
			}

			childrenMenus.push(router.children[item]);
		}
	});
	return constantRoutes.concat(childrenMenus);
});
// 默认激活的菜单
const activeMenu = computed(() => {
	const {path} = route;
	let activePath = path;
	if (
		path !== undefined
		&& path.lastIndexOf('/') > 0
		&& hideList.indexOf(path) === -1
	) {
		const tmpPath = path.substring(1, path.length);
		activePath = '/' + tmpPath.substring(0, tmpPath.indexOf('/'));
		appStore.toggleSideBarHide(false);
	} else if (!route.children) {
		activePath = path;
		appStore.toggleSideBarHide(true);
	}

	activeRoutes(activePath);
	return activePath;
});
function setVisibleNumber() {
	const width = document.body.getBoundingClientRect().width / 3;
	visibleNumber.value = parseInt(width / 85);
}

function handleSelect(key, keyPath) {
	currentIndex.value = key;
	const route = routers.value.find(item => item.path === key);
	if (isHttp(key)) {
		// http(s):// 路径新窗口打开
		window.open(key, '_blank');
	} else if (!route || !route.children) {
		// 没有子路由路径内部打开
		router.push({path: key});
		appStore.toggleSideBarHide(true);
	} else {
		// 显示左侧联动菜单
		activeRoutes(key);
		appStore.toggleSideBarHide(false);
	}
}

function activeRoutes(key) {
	const routes = [];
	if (childrenMenus.value && childrenMenus.value.length > 0) {
		childrenMenus.value.map(item => {
			if (key == item.parentPath || (key == 'index' && item.path == '')) {
				routes.push(item);
			}
		});
	}

	if (routes.length > 0) {
		permissionStore.setSidebarRouters(routes);
	}

	return routes;
}

onMounted(() => {
	window.addEventListener('resize', setVisibleNumber);
});
onBeforeUnmount(() => {
	window.removeEventListener('resize', setVisibleNumber);
});
onMounted(() => {
	setVisibleNumber();
});
</script>

<style lang="scss">
.topmenu-container.el-menu--horizontal > .el-menu-item {
	float: left;
	height: 50px !important;
	line-height: 50px !important;
	color: #999093 !important;
	padding: 0 5px !important;
	margin: 0 10px !important;
}
.topmenu-container.el-menu--horizontal > .el-menu-item.is-active,
.el-menu--horizontal > .el-sub-menu.is-active .el-submenu__title {
	border-bottom: 2px solid #{"var(--theme)"} !important;
	color: #303133;
}
/* sub-menu item */
.topmenu-container.el-menu--horizontal > .el-sub-menu .el-sub-menu__title {
	float: left;
	height: 50px !important;
	line-height: 50px !important;
	color: #999093 !important;
	padding: 0 5px !important;
	margin: 0 10px !important;
}
</style>
